The ornamental design for a chargingdevice, as shown and described.
FIG. 1 is a front perspective view of a charging device showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a side elevational view thereof;
FIG. 5 is an opposite side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a rear perspective view thereof.
The broken lines in FIGS. 1-8 represent portions of the charging device that form no part of the claimed design. The dot-dash line which defines the bounds of the claimed design forms no part thereof.